Door-latch.



E. W.A MEYER.

DOOR LATCH.

` APPLICATION FILED NOV. 16, 15124 1,054,978, Pnd Mar. 4, 1913.

l. UNITED srarasratrnn'r onirica.

- following is a-specitication,

base and doors, the latter being swung open a citizen of the lluited States, and a resident to disclose one of the locks. Fig. 2 is a plan va sectional elevation of a portion of the top plate.

ERNEST W. MEYER, OF

NEW YORK. N. Y.

DOOR-LATCH.

To nl? wkn-mA it may concern.'

Be it ltnown that l. ERNEST \V. MEYER,

ot' the city. county. and State of New York, have invented certain new and useful Irnprovements in Door-Latches, of which the Y reference being had to the accompanying drawings, forining a part thereof.

My invention relates to means for locking doors, windows' or similar devices which are arranged in pairs.

The object of my invention is to provide a simple and compact means of the aforesaid character that shall be particularly applicable to double doors .and shall hold one of the doors in closed position and lock it in its closed position when the other door is closed.

Figure 1 of the accompanying drawings is an elevation of a door frame and double doors equipped with the lock of-my invention, certain of the parts being broken away View o'n a larger scale, of a portion of the slightly. Fig. 3 is a view corresponding to Fig. 2 with the doors closed and the pins, which form parts of the lock at the topof the door, shown i'n cross section. Fig. 4 is of the door frame at right angles to Fig. 1. Like characters of reference designate corresponding parts in all the figures.

Referring to the drawings, the structure here shown comprises a' door frame or cabinet having a base 10, side members 11 1and 12, atop having a front strip 13, a pair of` doors 15 and 16 which are respectively swung from the side members 11 and 1Q by hinges 17 and 18 and locks 1!) at the top and base, only the top one being shown in Fig. 1. The door 16 may be provided with a strip 2() which overlaps the adjacent edge of the door 15. Each of the locks 19 com prises a plate 30 to which a pawl 31 is pivotally secured by a pin 32, and cams '33 and 54. The plate 30 fitted into a recess either in the base 10 or the front strip 13 as the case may be and the pawl 31 is located under the plate in the recess .and is provided with outwardly projecting pins 35 and 36 which extend through slots 37 and. 38 inthe The arrangement of parts is'such tlrarLwhen the plate 1s mountcdin position Specification of Letters'latent.

it is flish with the surface of the member in Patented Mar. 4, 1913.

'Application filed November 16, 1912.' SerialNo. 731,652

which it. is embedded except for the pins 35 and 3G which project slightly beyond said surface.

The camsl 33 aud 31 are respectively elnbedded in the edges of the doors 15 and 16 and are adapted to cooperate with the pins 35 and 36 as hereinafter pointed out. The cam 33 consists of a small plate having notches L10 and 41 and an intermediate tongue '112. The outline of the notch 41 and the adjacent surface of the tongue form a reverse curve while the surface of the tonguel adjacent to the notch 4() is a straight line, which forms an acute angle withV the plane of the door.4 The cam 8-'1 consists ot a plate which is provided with a single notch 45. j

The slots 37 and 38 in the plate 30 permit a limited rotative adjustment of the pawl 31 about the pin 32 as an axis.

The operation of the lock is as follows: Assuming that the doors are open and the pawl occupies the position in which it is illustrated in Fig. 2, if the door 15 is swung closed the straight surface 4:6 of the tongue i 42 will engage the pin and will swing the pawl 31 into its opposite position, the pin 3G riding over the reverse curved surface L17 into the notch 41. It' the pawl does not happen to be intheposition in which it is shown in Fig. 3 when the door 15 is swung against it. the inner portion of the reverse curve 47 will strike against the pin 3G to torce it over to the right and bring the parts into proper position t'or the straight. edge 4G to engage pin-3f. The pin projections ot' the' pawl limit theI inward swing of the door 15 and hold it in its closed position. lint this is not a positive hold because. the outer 'portion oi the reverse curve 47 is so shaped as to force the pin :di over to the. right when a sutlicient outward pull is exerted upon the door 15. lt however, the door 1G is closed, the pin 3G falls into the notch 45, which is relatively shallow thereby holding the door 16 in the closed position without locking it and positively locking the door 16 closed since the notch -ll is relatively deep. 'lhe parts now :occupy the position shown in Fig.V 3 and it is only necessary to lock the door 1G to the door 15` in any well known manner such as an ordinary bolt lock in order to lock both ot' the doors securely in vtheir closed positions.

Cri

'receive it.

der to provide Shoulders 1.8 whieli asist in holding the pawl 3l close to the plate 30 without interferingl with its-rotative niovenient.

The loeh of iny invention its ot lapeeial utility` and advantage heeause it eonipriatw4 a very few siniple parte whit-h niay he :osenihlet without dillieulty. The u e ot VQpringxA in entirely avoided so that there i nothing" to f iet out of order. The plate lll is coinparatively small and together with the pawl ll is very thin so that it is only neeeSsxii'y to provide a shallow reeesh, to

lt. if; no wider than the thieltness of an ordinary door. The eanih lll and Sl have only the thieltness ot sheet metal and are so narrow that they do not extend beyond the edgrea of very thin doors. Blocks or special i'einliortentents are rendered Superthious4 o that the iinftall:ititin otI the device is easy and inay he done with eoniparatively unqltilled lahor. .\t` the saine tiine the doors are locked vetv seeurely in position when hoth are elosed and lot-lied together. lVl'ien they are not loelted to gether they will i'einain in the lo.-;ed posiA tion until Sonie pull is exerted on the right hand door. lYhen this door is opened. the

other door inay be pulled open without re and are used only for eonven-ieuee since. the 5 'i -atationary plate having?r a pawl pivoted thereon and eireiunferentialiy curved islotvl lock ii'iay he 1.itilized with doors. windows and other devires which lie in either vertical, oblique or horizontal plane. and int-e the doorsl may he readily arranged to elo e in any dean-ed order. lt ia alao ohvitzu I that it is not neeessary to have the e leelts at both top and hottoni ot the doors.

l. Thecombination with a hase. a top and hingtrsuppta'ted nieinhers. otl a pivoted pawl einhedded in one olE the stationary ineinhers and having*y outwardly extending' projeetionn and a pair e."

in the hinge-mpported nient eani v einlie-dded hei-av and adapted to eoipei'ate willi the pawl proieetionn a pair ot' doors hinged to the .side nieinhers1 of a pivoted pawl einhedded in one of the ineinheis and having pin pi't'ijef-tious extendw ing beyond the nurtaee ot the nieinher and a pair of Gains enihedded in the, respective door edgee. one having a tongue pr tion wliieh is adapted to produee a rotatiie. adjustinent of the pawl when its door i5 closed and the other otE which provided with a shallow notch whieh holds the pawl in the position to which it is swung` when the first door is elosed.

3. The eomhiiiation with a door traine, eoinprising a top having a trout strip, a hase and a pair ol `eide ineinheifs, and a pair oit' doornv hinged to the respective side ineinhers. ot a Slotted plate enihetlded in the hase, a pawl pivotally mounted on the inner surface of' the plate and havingt pino` that project outwardly through die slots. a nain comprising a plate. notehed to provide a tongue and secured to the edge ol' one door and a Second Cani having a shallow notch and secured to the edge ot the other door` said slots heilig?r a'rrai'iged to pei'niit a limited rotative uioveuient ot the pawl. Said tongue being adapted to eot'perate with the pin to swing the pawl troni one position to anothe' as it 4 door is opened and .eloaed and the other eani heinel adapted to cooperate with one pin to hold its door in poaition and to leek the other door in position when hoth are Closed,

l. fr lot'hY tor douhle doors ooiiipriaii'ig a coaxial with the pawl 'pins eeuied to ih pawl and projecting' through the Stola. a rain plate adapted to he @eotu'ed to one door and having notehen and an intermediate tongue 'orined thereoy and a eain plate adapted to he seeiued to the other door and having a relatively yshallow notch, said tongue being adapted to extend between and eoi'iperate with the pins to swing the pawl on its axis and the shallow notch heing adapted to eooperate with one ot the pino to loelt the pawl iii one position.

ln wituesw' whereof, l have hereunto set niy hand thinl 17| day ot loveniher. i912. Elllilli'l ld". )d llillll. lvv itn'enses:

l", (lluvias, G. ll. Qi'inny. 

